## satisfaction_level last_evaluation number_project average_montly_hours
## Min. :0.0900 Min. :0.3600 Min. :2.000 Min. : 96.0
## 1st Qu.:0.4400 1st Qu.:0.5600 1st Qu.:3.000 1st Qu.:156.0
## Median :0.6400 Median :0.7200 Median :4.000 Median :200.0
## Mean :0.6128 Mean :0.7161 Mean :3.803 Mean :201.1
## 3rd Qu.:0.8200 3rd Qu.:0.8700 3rd Qu.:5.000 3rd Qu.:245.0
## Max. :1.0000 Max. :1.0000 Max. :7.000 Max. :310.0
##
## time_spend_company Work_accident left promotion_last_5years
## Min. : 2.000 No Accident :12830 Left : 3571 Min. :0.00000
## 1st Qu.: 3.000 Yes Accident: 2169 Stayed:11428 1st Qu.:0.00000
## Median : 3.000 Median :0.00000
## Mean : 3.498 Mean :0.02127
## 3rd Qu.: 4.000 3rd Qu.:0.00000
## Max. :10.000 Max. :1.00000
##
## salary department
## high :1237 sales :4140
## low :7316 technical :2720
## medium:6446 support :2229
## IT :1227
## product_mng: 902
## marketing : 858
## (Other) :2923##
## Welch Two Sample t-test
##
## data: hr$satisfaction_level by hr$left
## t = -46.636, df = 5167, p-value < 2.2e-16
## alternative hypothesis: true difference in means between group Left and group Stayed is not equal to 0
## 95 percent confidence interval:
## -0.2362417 -0.2171815
## sample estimates:
## mean in group Left mean in group Stayed
## 0.4400980 0.6668096##
## Welch Two Sample t-test
##
## data: hr$last_evaluation by hr$left
## t = 0.72534, df = 5154.9, p-value = 0.4683
## alternative hypothesis: true difference in means between group Left and group Stayed is not equal to 0
## 95 percent confidence interval:
## -0.004493874 0.009772224
## sample estimates:
## mean in group Left mean in group Stayed
## 0.7181126 0.7154734##
## Welch Two Sample t-test
##
## data: hr$number_project by hr$left
## t = 2.1663, df = 4236.5, p-value = 0.03034
## alternative hypothesis: true difference in means between group Left and group Stayed is not equal to 0
## 95 percent confidence interval:
## 0.006540119 0.131136535
## sample estimates:
## mean in group Left mean in group Stayed
## 3.855503 3.786664##
## Welch Two Sample t-test
##
## data: hr$average_montly_hours by hr$left
## t = 7.5323, df = 4875.1, p-value = 5.907e-14
## alternative hypothesis: true difference in means between group Left and group Stayed is not equal to 0
## 95 percent confidence interval:
## 6.183384 10.534631
## sample estimates:
## mean in group Left mean in group Stayed
## 207.4192 199.0602##
## Welch Two Sample t-test
##
## data: hr$time_spend_company by hr$left
## t = 22.631, df = 9625.6, p-value < 2.2e-16
## alternative hypothesis: true difference in means between group Left and group Stayed is not equal to 0
## 95 percent confidence interval:
## 0.4534706 0.5394767
## sample estimates:
## mean in group Left mean in group Stayed
## 3.876505 3.380032##
##
## Cell Contents
## |-------------------------|
## | N |
## | Chi-square contribution |
## | N / Row Total |
## | N / Col Total |
## | N / Table Total |
## |-------------------------|
##
##
## Total Observations in Table: 14999
##
##
## | hr$Work_accident
## hr$left | No Accident | Yes Accident | Row Total |
## -------------|--------------|--------------|--------------|
## Left | 3402 | 169 | 3571 |
## | 39.510 | 233.709 | |
## | 0.953 | 0.047 | 0.238 |
## | 0.265 | 0.078 | |
## | 0.227 | 0.011 | |
## -------------|--------------|--------------|--------------|
## Stayed | 9428 | 2000 | 11428 |
## | 12.346 | 73.029 | |
## | 0.825 | 0.175 | 0.762 |
## | 0.735 | 0.922 | |
## | 0.629 | 0.133 | |
## -------------|--------------|--------------|--------------|
## Column Total | 12830 | 2169 | 14999 |
## | 0.855 | 0.145 | |
## -------------|--------------|--------------|--------------|
##
##
## Statistics for All Table Factors
##
##
## Pearson's Chi-squared test
## ------------------------------------------------------------
## Chi^2 = 358.5938 d.f. = 1 p = 5.698673e-80
##
## Pearson's Chi-squared test with Yates' continuity correction
## ------------------------------------------------------------
## Chi^2 = 357.5624 d.f. = 1 p = 9.55824e-80
##
## The relative risk of staying when having a work accident is
3.7.
If you have a work accident, you are 3.7 time more likely to stay
##
##
## Cell Contents
## |-------------------------|
## | N |
## | Chi-square contribution |
## | N / Row Total |
## | N / Col Total |
## | N / Table Total |
## |-------------------------|
##
##
## Total Observations in Table: 14999
##
##
## | hr$promotion_last_5years
## hr$left | 0 | 1 | Row Total |
## -------------|-----------|-----------|-----------|
## Left | 3552 | 19 | 3571 |
## | 0.928 | 42.702 | |
## | 0.995 | 0.005 | 0.238 |
## | 0.242 | 0.060 | |
## | 0.237 | 0.001 | |
## -------------|-----------|-----------|-----------|
## Stayed | 11128 | 300 | 11428 |
## | 0.290 | 13.343 | |
## | 0.974 | 0.026 | 0.762 |
## | 0.758 | 0.940 | |
## | 0.742 | 0.020 | |
## -------------|-----------|-----------|-----------|
## Column Total | 14680 | 319 | 14999 |
## | 0.979 | 0.021 | |
## -------------|-----------|-----------|-----------|
##
##
## Statistics for All Table Factors
##
##
## Pearson's Chi-squared test
## ------------------------------------------------------------
## Chi^2 = 57.26273 d.f. = 1 p = 3.813123e-14
##
## Pearson's Chi-squared test with Yates' continuity correction
## ------------------------------------------------------------
## Chi^2 = 56.26163 d.f. = 1 p = 6.344155e-14
##
## People that did not get a promotion in the past 5 years are 4 times more likely to leave
##
##
## Cell Contents
## |-------------------------|
## | N |
## | Chi-square contribution |
## | N / Row Total |
## | N / Col Total |
## | N / Table Total |
## |-------------------------|
##
##
## Total Observations in Table: 14999
##
##
## | hr$salary
## hr$left | high | low | medium | Row Total |
## -------------|-----------|-----------|-----------|-----------|
## Left | 82 | 2172 | 1317 | 3571 |
## | 153.339 | 106.247 | 30.876 | |
## | 0.023 | 0.608 | 0.369 | 0.238 |
## | 0.066 | 0.297 | 0.204 | |
## | 0.005 | 0.145 | 0.088 | |
## -------------|-----------|-----------|-----------|-----------|
## Stayed | 1155 | 5144 | 5129 | 11428 |
## | 47.915 | 33.200 | 9.648 | |
## | 0.101 | 0.450 | 0.449 | 0.762 |
## | 0.934 | 0.703 | 0.796 | |
## | 0.077 | 0.343 | 0.342 | |
## -------------|-----------|-----------|-----------|-----------|
## Column Total | 1237 | 7316 | 6446 | 14999 |
## | 0.082 | 0.488 | 0.430 | |
## -------------|-----------|-----------|-----------|-----------|
##
##
## Statistics for All Table Factors
##
##
## Pearson's Chi-squared test
## ------------------------------------------------------------
## Chi^2 = 381.225 d.f. = 2 p = 1.652087e-83
##
##
## The higher the salary, the less likely to leave
##
##
## Cell Contents
## |-------------------------|
## | N |
## | Chi-square contribution |
## | N / Row Total |
## | N / Col Total |
## | N / Table Total |
## |-------------------------|
##
##
## Total Observations in Table: 14999
##
##
## | hr$left
## hr$department | Left | Stayed | Row Total |
## --------------|-----------|-----------|-----------|
## accounting | 204 | 563 | 767 |
## | 2.506 | 0.783 | |
## | 0.266 | 0.734 | 0.051 |
## | 0.057 | 0.049 | |
## | 0.014 | 0.038 | |
## --------------|-----------|-----------|-----------|
## hr | 215 | 524 | 739 |
## | 8.670 | 2.709 | |
## | 0.291 | 0.709 | 0.049 |
## | 0.060 | 0.046 | |
## | 0.014 | 0.035 | |
## --------------|-----------|-----------|-----------|
## IT | 273 | 954 | 1227 |
## | 1.252 | 0.391 | |
## | 0.222 | 0.778 | 0.082 |
## | 0.076 | 0.083 | |
## | 0.018 | 0.064 | |
## --------------|-----------|-----------|-----------|
## management | 91 | 539 | 630 |
## | 23.202 | 7.250 | |
## | 0.144 | 0.856 | 0.042 |
## | 0.025 | 0.047 | |
## | 0.006 | 0.036 | |
## --------------|-----------|-----------|-----------|
## marketing | 203 | 655 | 858 |
## | 0.008 | 0.002 | |
## | 0.237 | 0.763 | 0.057 |
## | 0.057 | 0.057 | |
## | 0.014 | 0.044 | |
## --------------|-----------|-----------|-----------|
## product_mng | 198 | 704 | 902 |
## | 1.307 | 0.408 | |
## | 0.220 | 0.780 | 0.060 |
## | 0.055 | 0.062 | |
## | 0.013 | 0.047 | |
## --------------|-----------|-----------|-----------|
## RandD | 121 | 666 | 787 |
## | 23.510 | 7.346 | |
## | 0.154 | 0.846 | 0.052 |
## | 0.034 | 0.058 | |
## | 0.008 | 0.044 | |
## --------------|-----------|-----------|-----------|
## sales | 1014 | 3126 | 4140 |
## | 0.815 | 0.255 | |
## | 0.245 | 0.755 | 0.276 |
## | 0.284 | 0.274 | |
## | 0.068 | 0.208 | |
## --------------|-----------|-----------|-----------|
## support | 555 | 1674 | 2229 |
## | 1.114 | 0.348 | |
## | 0.249 | 0.751 | 0.149 |
## | 0.155 | 0.146 | |
## | 0.037 | 0.112 | |
## --------------|-----------|-----------|-----------|
## technical | 697 | 2023 | 2720 |
## | 3.771 | 1.178 | |
## | 0.256 | 0.744 | 0.181 |
## | 0.195 | 0.177 | |
## | 0.046 | 0.135 | |
## --------------|-----------|-----------|-----------|
## Column Total | 3571 | 11428 | 14999 |
## | 0.238 | 0.762 | |
## --------------|-----------|-----------|-----------|
##
##
## Statistics for All Table Factors
##
##
## Pearson's Chi-squared test
## ------------------------------------------------------------
## Chi^2 = 86.82547 d.f. = 9 p = 7.04213e-15
##
##
##